Greg Willenborg was an American producer and activist.

In 1982, he started his own independent entertainment production company, Willenborg Productions, Inc., that focused on original content in film as well as live event productions.

Willemborg's project involvement included: Broadway at the Hollywood Bowl (1994), Ray Charles: 50 Years in Music (1991), America's Hope Awards Special (1990), America's Dance Honors (1990), America's All Star Tribute to Elizabeth Taylor (1989), and America's Tribute to Bob Hope (1988).

In addition to his contribution in live television, Willenborg is perhaps best remembered for his political activism in the Los Angeles community.

Willenborg died January 24, 2019, in West Hollywood, California. He was 60.